package com.wei.tang.widget.video;

import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.content.res.TypedArray;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Build;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityNodeInfo;

import java.io.IOException;
import java.util.Map;

import com.wei.tang.R;
import com.wei.tang.util.Tlog;

public class UniversalVideoView extends SurfaceView
		implements UniversalMediaController.MediaPlayerControl, OrientationDetector.OrientationChangeListener {
	private String TAG = "UniversalVideoView";
	// settable by the client
	private Uri mUri;

	// all possible internal states
	private static final int STATE_ERROR = -1;
	private static final int STATE_IDLE = 0;
	private static final int STATE_PREPARING = 1;
	private static final int STATE_PREPARED = 2;
	private static final int STATE_PLAYING = 3;
	private static final int STATE_PAUSED = 4;
	private static final int STATE_PLAYBACK_COMPLETED = 5;

	// mCurrentState is a VideoView object's current state.
	// mTargetState is the state that a method caller intends to reach.
	// For instance, regardless the VideoView object's current state,
	// calling pause() intends to bring the object to a target state
	// of STATE_PAUSED.
	private int mCurrentState = STATE_IDLE;
	private int mTargetState = STATE_IDLE;

	// All the stuff we need for playing and showing a video
	private SurfaceHolder mSurfaceHolder = null;
	private MediaPlayer mMediaPlayer = null;
	private int mAudioSession;
	private int mVideoWidth;
	private int mVideoHeight;
	private int mSurfaceWidth;
	private int mSurfaceHeight;
	private UniversalMediaController mMediaController;
	private MediaPlayer.OnCompletionListener mOnCompletionListener;
	private MediaPlayer.OnPreparedListener mOnPreparedListener;
	private int mCurrentBufferPercentage;
	private MediaPlayer.OnErrorListener mOnErrorListener;
	private MediaPlayer.OnInfoListener mOnInfoListener;
	private int mSeekWhenPrepared; // recording the seek position while
									// preparing
	private boolean mCanPause;
	private boolean mCanSeekBack;
	private boolean mCanSeekForward;
	private boolean mPreparedBeforeStart;
	private Context mContext;
	private boolean mFitXY = false;
	private boolean mAutoRotation = false;
	private int mVideoViewLayoutWidth = 0;
	private int mVideoViewLayoutHeight = 0;

	private OrientationDetector mOrientationDetector;
	private VideoViewCallback videoViewCallback;

	public UniversalVideoView(Context context) {
		this(context, null);
	}

	public UniversalVideoView(Context context, AttributeSet attrs) {
		this(context, attrs, 0);
	}

	public UniversalVideoView(Context context, AttributeSet attrs, int defStyleAttr) {
		super(context, attrs, defStyleAttr);
		mContext = context;
		TypedArray a = mContext.obtainStyledAttributes(attrs, R.styleable.UniversalVideoView, 0, 0);
		mFitXY = a.getBoolean(R.styleable.UniversalVideoView_uvv_fitXY, false);
		mAutoRotation = a.getBoolean(R.styleable.UniversalVideoView_uvv_autoRotation, false);
		a.recycle();
		initVideoView();
	}

	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		super.onMeasure(widthMeasureSpec, heightMeasureSpec);
		if (mFitXY) {
			onMeasureFitXY(widthMeasureSpec, heightMeasureSpec);
		} else {
			onMeasureKeepAspectRatio(widthMeasureSpec, heightMeasureSpec);
		}
	}

	private void onMeasureFitXY(int widthMeasureSpec, int heightMeasureSpec) {
		int width = getDefaultSize(mVideoWidth, widthMeasureSpec);
		int height = getDefaultSize(mVideoHeight, heightMeasureSpec);
		setMeasuredDimension(width, height);
	}

	private void onMeasureKeepAspectRatio(int widthMeasureSpec, int heightMeasureSpec) {
		// Log.i("@@@@", "onMeasure(" + MeasureSpec.toString(widthMeasureSpec) +
		// ", "
		// + MeasureSpec.toString(heightMeasureSpec) + ")");

		int width = getDefaultSize(mVideoWidth, widthMeasureSpec);
		int height = getDefaultSize(mVideoHeight, heightMeasureSpec);
		if (mVideoWidth > 0 && mVideoHeight > 0) {

			int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec);
			int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec);
			int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec);
			int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec);

			if (widthSpecMode == MeasureSpec.EXACTLY && heightSpecMode == MeasureSpec.EXACTLY) {
				// the size is fixed
				width = widthSpecSize;
				height = heightSpecSize;

				// for compatibility, we adjust size based on aspect ratio
				if (mVideoWidth * height < width * mVideoHeight) {
					// Log.i("@@@", "image too wide, correcting");
					width = height * mVideoWidth / mVideoHeight;
				} else if (mVideoWidth * height > width * mVideoHeight) {
					// Log.i("@@@", "image too tall, correcting");
					height = width * mVideoHeight / mVideoWidth;
				}
			} else if (widthSpecMode == MeasureSpec.EXACTLY) {
				// only the width is fixed, adjust the height to match aspect
				// ratio if possible
				width = widthSpecSize;
				height = width * mVideoHeight / mVideoWidth;
				if (heightSpecMode == MeasureSpec.AT_MOST && height > heightSpecSize) {
					// couldn't match aspect ratio within the constraints
					height = heightSpecSize;
				}
			} else if (heightSpecMode == MeasureSpec.EXACTLY) {
				// only the height is fixed, adjust the width to match aspect
				// ratio if possible
				height = heightSpecSize;
				width = height * mVideoWidth / mVideoHeight;
				if (widthSpecMode == MeasureSpec.AT_MOST && width > widthSpecSize) {
					// couldn't match aspect ratio within the constraints
					width = widthSpecSize;
				}
			} else {
				// neither the width nor the height are fixed, try to use actual
				// video size
				width = mVideoWidth;
				height = mVideoHeight;
				if (heightSpecMode == MeasureSpec.AT_MOST && height > heightSpecSize) {
					// too tall, decrease both width and height
					height = heightSpecSize;
					width = height * mVideoWidth / mVideoHeight;
				}
				if (widthSpecMode == MeasureSpec.AT_MOST && width > widthSpecSize) {
					// too wide, decrease both width and height
					width = widthSpecSize;
					height = width * mVideoHeight / mVideoWidth;
				}
			}
		} else {
			// no size yet, just adopt the given spec sizes
		}
		setMeasuredDimension(width, height);
	}

	@Override
	public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
		super.onInitializeAccessibilityEvent(event);
		event.setClassName(UniversalVideoView.class.getName());
	}

	@Override
	public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
		super.onInitializeAccessibilityNodeInfo(info);
		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
			info.setClassName(UniversalVideoView.class.getName());
		}
	}

	public int resolveAdjustedSize(int desiredSize, int measureSpec) {
		return getDefaultSize(desiredSize, measureSpec);
	}

	private void initVideoView() {
		mVideoWidth = 0;
		mVideoHeight = 0;
		getHolder().addCallback(mSHCallback);
		getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
		setFocusable(true);
		setFocusableInTouchMode(true);
		requestFocus();
		mCurrentState = STATE_IDLE;
		mTargetState = STATE_IDLE;
	}

	@Override
	public void onOrientationChanged(int screenOrientation, OrientationDetector.Direction direction) {
		if (!mAutoRotation) {
			return;
		}

		if (direction == OrientationDetector.Direction.PORTRAIT) {
			setFullscreen(false, ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
		} else if (direction == OrientationDetector.Direction.REVERSE_PORTRAIT) {
			setFullscreen(false, ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT);
		} else if (direction == OrientationDetector.Direction.LANDSCAPE) {
			setFullscreen(true, ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
		} else if (direction == OrientationDetector.Direction.REVERSE_LANDSCAPE) {
			setFullscreen(true, ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
		}
	}

	public void setFitXY(boolean fitXY) {
		mFitXY = fitXY;
	}

	public void setAutoRotation(boolean auto) {
		mAutoRotation = auto;
	}

	/**
	 * Sets video path.
	 *
	 * @param path
	 *            the path of the video.
	 */
	public void setVideoPath(String path) {
		setVideoURI(Uri.parse(path));
	}

	/**
	 * Sets video URI.
	 *
	 * @param uri
	 *            the URI of the video.
	 */
	public void setVideoURI(Uri uri) {
		setVideoURI(uri, null);
	}

	/**
	 * Sets video URI using specific headers.
	 *
	 * @param uri
	 *            the URI of the video.
	 * @param headers
	 *            the headers for the URI request. Note that the cross domain
	 *            redirection is allowed by default, but that can be changed
	 *            with key/value pairs through the headers parameter with
	 *            "android-allow-cross-domain-redirect" as the key and "0" or
	 *            "1" as the value to disallow or allow cross domain
	 *            redirection.
	 */
	public void setVideoURI(Uri uri, Map<String, String> headers) {
		mUri = uri;
		mSeekWhenPrepared = 0;
		openVideo();
		requestLayout();
		invalidate();
	}

	public void stopPlayback() {
		if (mMediaPlayer != null) {
			mMediaPlayer.stop();
			mMediaPlayer.release();
			mMediaPlayer = null;
			mCurrentState = STATE_IDLE;
			mTargetState = STATE_IDLE;
		}
	}

	private void openVideo() {
		if (mUri == null || mSurfaceHolder == null) {
			// not ready for playback just yet, will try again later
			return;
		}
		AudioManager am = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
		am.requestAudioFocus(null, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN);

		// we shouldn't clear the target state, because somebody might have
		// called start() previously
		release(false);
		try {
			mMediaPlayer = new MediaPlayer();

			if (mAudioSession != 0) {
				mMediaPlayer.setAudioSessionId(mAudioSession);
			} else {
				mAudioSession = mMediaPlayer.getAudioSessionId();
			}
			mMediaPlayer.setOnPreparedListener(mPreparedListener);
			mMediaPlayer.setOnVideoSizeChangedListener(mSizeChangedListener);
			mMediaPlayer.setOnCompletionListener(mCompletionListener);
			mMediaPlayer.setOnErrorListener(mErrorListener);
			mMediaPlayer.setOnInfoListener(mInfoListener);
			mMediaPlayer.setOnBufferingUpdateListener(mBufferingUpdateListener);
			mCurrentBufferPercentage = 0;
			mMediaPlayer.setDataSource(mContext, mUri);
			mMediaPlayer.setDisplay(mSurfaceHolder);
			mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
			mMediaPlayer.setScreenOnWhilePlaying(true);
			mMediaPlayer.prepareAsync();

			// we don't set the target state here either, but preserve the
			// target state that was there before.
			mCurrentState = STATE_PREPARING;
			attachMediaController();
		} catch (IOException ex) {
			Tlog.w(TAG, "Unable to open content: " + mUri + "--" + ex.getMessage());
			mCurrentState = STATE_ERROR;
			mTargetState = STATE_ERROR;
			mErrorListener.onError(mMediaPlayer, MediaPlayer.MEDIA_ERROR_UNKNOWN, 0);
		}
	}

	public void setMediaController(UniversalMediaController controller) {
		if (mMediaController != null) {
			mMediaController.hide();
		}
		mMediaController = controller;
		attachMediaController();
	}

	private void attachMediaController() {
		if (mMediaPlayer != null && mMediaController != null) {
			mMediaController.setMediaPlayer(this);
			mMediaController.setEnabled(isInPlaybackState());
			mMediaController.hide();
		}
	}

	MediaPlayer.OnVideoSizeChangedListener mSizeChangedListener = new MediaPlayer.OnVideoSizeChangedListener() {
		public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {
			mVideoWidth = mp.getVideoWidth();
			mVideoHeight = mp.getVideoHeight();
			Tlog.d(TAG, String.format("onVideoSizeChanged width=%d,height=%d", mVideoWidth, mVideoHeight));
			if (mVideoWidth != 0 && mVideoHeight != 0) {
				getHolder().setFixedSize(mVideoWidth, mVideoHeight);
				requestLayout();
			}
		}
	};

	MediaPlayer.OnPreparedListener mPreparedListener = new MediaPlayer.OnPreparedListener() {
		public void onPrepared(MediaPlayer mp) {
			mCurrentState = STATE_PREPARED;

			mCanPause = mCanSeekBack = mCanSeekForward = true;

			mPreparedBeforeStart = true;
			if (mMediaController != null) {
				mMediaController.hideLoading();
			}

			if (mOnPreparedListener != null) {
				mOnPreparedListener.onPrepared(mMediaPlayer);
			}
			if (mMediaController != null) {
				mMediaController.setEnabled(true);
			}
			mVideoWidth = mp.getVideoWidth();
			mVideoHeight = mp.getVideoHeight();

			int seekToPosition = mSeekWhenPrepared; // mSeekWhenPrepared may be
													// changed after seekTo()
													// call
			if (seekToPosition != 0) {
				seekTo(seekToPosition);
			}
			if (mVideoWidth != 0 && mVideoHeight != 0) {
				// Log.i("@@@@", "video size: " + mVideoWidth +"/"+
				// mVideoHeight);
				getHolder().setFixedSize(mVideoWidth, mVideoHeight);
				if (mSurfaceWidth == mVideoWidth && mSurfaceHeight == mVideoHeight) {
					// We didn't actually change the size (it was already at the
					// size
					// we need), so we won't get a "surface changed" callback,
					// so
					// start the video here instead of in the callback.
					if (mTargetState == STATE_PLAYING) {
						start();
						if (mMediaController != null) {
							mMediaController.show();
						}
					} else if (!isPlaying() && (seekToPosition != 0 || getCurrentPosition() > 0)) {
						if (mMediaController != null) {
							// Show the media controls when we're paused into a
							// video and make 'em stick.
							mMediaController.show(0);
						}
					}
				}
			} else {
				// We don't know the video size yet, but should start anyway.
				// The video size might be reported to us later.
				if (mTargetState == STATE_PLAYING) {
					start();
				}
			}
		}
	};

	private MediaPlayer.OnCompletionListener mCompletionListener = new MediaPlayer.OnCompletionListener() {
		public void onCompletion(MediaPlayer mp) {
			mCurrentState = STATE_PLAYBACK_COMPLETED;
			mTargetState = STATE_PLAYBACK_COMPLETED;
			if (mMediaController != null) {
				boolean a = mMediaPlayer.isPlaying();
				int b = mCurrentState;
				mMediaController.showComplete();
				// FIXME 播放完成后,视频中央会显示一个播放按钮,点击播放按钮会调用start重播,
				// 但start后竟然又回调到这里,导致第一次点击按钮不会播放视频,需要点击第二次.
				Tlog.d(TAG, String.format("a=%s,b=%d", a, b));
			}
			if (mOnCompletionListener != null) {
				mOnCompletionListener.onCompletion(mMediaPlayer);
			}
		}
	};

	private MediaPlayer.OnInfoListener mInfoListener = new MediaPlayer.OnInfoListener() {
		public boolean onInfo(MediaPlayer mp, int what, int extra) {
			boolean handled = false;
			switch (what) {
			case MediaPlayer.MEDIA_INFO_BUFFERING_START:
				Tlog.d(TAG, "onInfo MediaPlayer.MEDIA_INFO_BUFFERING_START");
				if (videoViewCallback != null) {
					videoViewCallback.onBufferingStart(mMediaPlayer);
				}
				if (mMediaController != null) {
					mMediaController.showLoading();
				}
				handled = true;
				break;
			case MediaPlayer.MEDIA_INFO_BUFFERING_END:
				Tlog.d(TAG, "onInfo MediaPlayer.MEDIA_INFO_BUFFERING_END");
				if (videoViewCallback != null) {
					videoViewCallback.onBufferingEnd(mMediaPlayer);
				}
				if (mMediaController != null) {
					mMediaController.hideLoading();
				}
				handled = true;
				break;
			}
			if (mOnInfoListener != null) {
				return mOnInfoListener.onInfo(mp, what, extra) || handled;
			}
			return handled;
		}
	};

	private MediaPlayer.OnErrorListener mErrorListener = new MediaPlayer.OnErrorListener() {
		public boolean onError(MediaPlayer mp, int framework_err, int impl_err) {
			Tlog.d(TAG, "Error: " + framework_err + "," + impl_err);
			mCurrentState = STATE_ERROR;
			mTargetState = STATE_ERROR;
			if (mMediaController != null) {
				mMediaController.showError();
			}

			/* If an error handler has been supplied, use it and finish. */
			if (mOnErrorListener != null) {
				if (mOnErrorListener.onError(mMediaPlayer, framework_err, impl_err)) {
					return true;
				}
			}

			/*
			 * Otherwise, pop up an error dialog so the user knows that
			 * something bad has happened. Only try and pop up the dialog if
			 * we're attached to a window. When we're going away and no longer
			 * have a window, don't bother showing the user an error.
			 */
			// if (getWindowToken() != null) {
			// Resources r = mContext.getResources();
			// int messageId;
			//
			// if (framework_err ==
			// MediaPlayer.MEDIA_ERROR_NOT_VALID_FOR_PROGRESSIVE_PLAYBACK) {
			// messageId =
			// com.android.internal.R.string.VideoView_error_text_invalid_progressive_playback;
			// } else {
			// messageId =
			// com.android.internal.R.string.VideoView_error_text_unknown;
			// }
			//
			// new AlertDialog.Builder(mContext)
			// .setMessage(messageId)
			// .setPositiveButton(com.android.internal.R.string.VideoView_error_button,
			// new DialogInterface.OnClickListener() {
			// public void onClick(DialogInterface dialog, int whichButton) {
			// /* If we get here, there is no onError listener, so
			// * at least inform them that the video is over.
			// */
			// if (mOnCompletionListener != null) {
			// mOnCompletionListener.onCompletion(mMediaPlayer);
			// }
			// }
			// })
			// .setCancelable(false)
			// .show();
			// }
			return true;
		}
	};

	private MediaPlayer.OnBufferingUpdateListener mBufferingUpdateListener = new MediaPlayer.OnBufferingUpdateListener() {
		public void onBufferingUpdate(MediaPlayer mp, int percent) {
			mCurrentBufferPercentage = percent;
		}
	};

	/**
	 * Register a callback to be invoked when the media file is loaded and ready
	 * to go.
	 *
	 * @param l
	 *            The callback that will be run
	 */
	public void setOnPreparedListener(MediaPlayer.OnPreparedListener l) {
		mOnPreparedListener = l;
	}

	/**
	 * Register a callback to be invoked when the end of a media file has been
	 * reached during playback.
	 *
	 * @param l
	 *            The callback that will be run
	 */
	public void setOnCompletionListener(MediaPlayer.OnCompletionListener l) {
		mOnCompletionListener = l;
	}

	/**
	 * Register a callback to be invoked when an error occurs during playback or
	 * setup. If no listener is specified, or if the listener returned false,
	 * VideoView will inform the user of any errors.
	 *
	 * @param l
	 *            The callback that will be run
	 */
	public void setOnErrorListener(MediaPlayer.OnErrorListener l) {
		mOnErrorListener = l;
	}

	/**
	 * Register a callback to be invoked when an informational event occurs
	 * during playback or setup.
	 *
	 * @param l
	 *            The callback that will be run
	 */
	public void setOnInfoListener(MediaPlayer.OnInfoListener l) {
		mOnInfoListener = l;
	}

	SurfaceHolder.Callback mSHCallback = new SurfaceHolder.Callback() {
		public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
			mSurfaceWidth = w;
			mSurfaceHeight = h;
			boolean isValidState = (mTargetState == STATE_PLAYING);
			boolean hasValidSize = (mVideoWidth == w && mVideoHeight == h);
			if (mMediaPlayer != null && isValidState && hasValidSize) {
				if (mSeekWhenPrepared != 0) {
					seekTo(mSeekWhenPrepared);
				}
				start();
			}
		}

		public void surfaceCreated(SurfaceHolder holder) {
			mSurfaceHolder = holder;
			openVideo();
			enableOrientationDetect();
		}

		public void surfaceDestroyed(SurfaceHolder holder) {
			// after we return from this we can't use the surface any more
			mSurfaceHolder = null;
			if (mMediaController != null)
				mMediaController.hide();
			release(true);
			disableOrientationDetect();
		}
	};

	private void enableOrientationDetect() {
		if (mAutoRotation && mOrientationDetector == null) {
			mOrientationDetector = new OrientationDetector(mContext);
			mOrientationDetector.setOrientationChangeListener(UniversalVideoView.this);
			mOrientationDetector.enable();
		}
	}

	private void disableOrientationDetect() {
		if (mOrientationDetector != null) {
			mOrientationDetector.disable();
		}
	}

	/*
	 * release the media player in any state
	 */
	private void release(boolean cleartargetstate) {
		if (mMediaPlayer != null) {
			mMediaPlayer.reset();
			mMediaPlayer.release();
			mMediaPlayer = null;
			mCurrentState = STATE_IDLE;
			if (cleartargetstate) {
				mTargetState = STATE_IDLE;
			}
		}
	}

	@Override
	public boolean onTouchEvent(MotionEvent ev) {
		if (isInPlaybackState() && mMediaController != null) {
			toggleMediaControlsVisibility();
		}
		return false;
	}

	@Override
	public boolean onTrackballEvent(MotionEvent ev) {
		if (isInPlaybackState() && mMediaController != null) {
			toggleMediaControlsVisibility();
		}
		return false;
	}

	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		boolean isKeyCodeSupported = keyCode != KeyEvent.KEYCODE_BACK && keyCode != KeyEvent.KEYCODE_VOLUME_UP
				&& keyCode != KeyEvent.KEYCODE_VOLUME_DOWN && keyCode != KeyEvent.KEYCODE_VOLUME_MUTE
				&& keyCode != KeyEvent.KEYCODE_MENU && keyCode != KeyEvent.KEYCODE_CALL
				&& keyCode != KeyEvent.KEYCODE_ENDCALL;
		if (isInPlaybackState() && isKeyCodeSupported && mMediaController != null) {
			if (keyCode == KeyEvent.KEYCODE_HEADSETHOOK || keyCode == KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE) {
				if (mMediaPlayer.isPlaying()) {
					pause();
					mMediaController.show();
				} else {
					start();
					mMediaController.hide();
				}
				return true;
			} else if (keyCode == KeyEvent.KEYCODE_MEDIA_PLAY) {
				if (!mMediaPlayer.isPlaying()) {
					start();
					mMediaController.hide();
				}
				return true;
			} else if (keyCode == KeyEvent.KEYCODE_MEDIA_STOP || keyCode == KeyEvent.KEYCODE_MEDIA_PAUSE) {
				if (mMediaPlayer.isPlaying()) {
					pause();
					mMediaController.show();
				}
				return true;
			} else {
				toggleMediaControlsVisibility();
			}
		}

		return super.onKeyDown(keyCode, event);
	}

	private void toggleMediaControlsVisibility() {
		if (mMediaController.isShowing()) {
			mMediaController.hide();
		} else {
			mMediaController.show();
		}
	}

	@Override
	public void start() {
		if (!mPreparedBeforeStart && mMediaController != null) {
			mMediaController.showLoading();
		}

		if (isInPlaybackState()) {
			mMediaPlayer.start();
			mCurrentState = STATE_PLAYING;
			if (this.videoViewCallback != null) {
				this.videoViewCallback.onStart(mMediaPlayer);
			}
		}
		mTargetState = STATE_PLAYING;
	}

	@Override
	public void pause() {
		if (isInPlaybackState()) {
			if (mMediaPlayer.isPlaying()) {
				mMediaPlayer.pause();
				mCurrentState = STATE_PAUSED;
				if (this.videoViewCallback != null) {
					this.videoViewCallback.onPause(mMediaPlayer);
				}
			}
		}
		mTargetState = STATE_PAUSED;
	}

	public void suspend() {
		release(false);
	}

	public void resume() {
		openVideo();
	}

	@Override
	public int getDuration() {
		if (isInPlaybackState()) {
			return mMediaPlayer.getDuration();
		}

		return -1;
	}

	@Override
	public int getCurrentPosition() {
		if (isInPlaybackState()) {
			return mMediaPlayer.getCurrentPosition();
		}
		return 0;
	}

	@Override
	public void seekTo(int msec) {
		if (isInPlaybackState()) {
			mMediaPlayer.seekTo(msec);
			mSeekWhenPrepared = 0;
		} else {
			mSeekWhenPrepared = msec;
		}
	}

	@Override
	public boolean isPlaying() {
		return isInPlaybackState() && mMediaPlayer.isPlaying();
	}

	@Override
	public int getBufferPercentage() {
		if (mMediaPlayer != null) {
			return mCurrentBufferPercentage;
		}
		return 0;
	}

	private boolean isInPlaybackState() {
		return (mMediaPlayer != null && mCurrentState != STATE_ERROR && mCurrentState != STATE_IDLE
				&& mCurrentState != STATE_PREPARING);
	}

	@Override
	public boolean canPause() {
		return mCanPause;
	}

	@Override
	public boolean canSeekBackward() {
		return mCanSeekBack;
	}

	@Override
	public boolean canSeekForward() {
		return mCanSeekForward;
	}

	@Override
	public void closePlayer() {
		release(true);
	}

	@Override
	public void setFullscreen(boolean fullscreen) {
		int screenOrientation = fullscreen ? ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE
				: ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
		setFullscreen(fullscreen, screenOrientation);
	}

	@Override
	public void setFullscreen(boolean fullscreen, int screenOrientation) {
		// Activity需要设置为:
		// android:configChanges="keyboardHidden|orientation|screenSize"
		Activity activity = (Activity) mContext;

		if (fullscreen) {
			if (mVideoViewLayoutWidth == 0 && mVideoViewLayoutHeight == 0) {
				ViewGroup.LayoutParams params = getLayoutParams();
				mVideoViewLayoutWidth = params.width;// 保存全屏之前的参数
				mVideoViewLayoutHeight = params.height;
			}
			activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
			activity.setRequestedOrientation(screenOrientation);
		} else {
			ViewGroup.LayoutParams params = getLayoutParams();
			params.width = mVideoViewLayoutWidth;// 使用全屏之前的参数
			params.height = mVideoViewLayoutHeight;
			setLayoutParams(params);

			activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
			activity.setRequestedOrientation(screenOrientation);
		}
		mMediaController.toggleButtons(fullscreen);
		if (videoViewCallback != null) {
			videoViewCallback.onScaleChange(fullscreen);
		}
	}

	/*
	 * @TargetApi(Build.VERSION_CODES.HONEYCOMB) private void
	 * switchTitleBar(boolean show) { if (mContext instanceof AppCompatActivity)
	 * { AppCompatActivity activity = (AppCompatActivity)mContext;
	 * android.support.v7.app.ActionBar supportActionBar =
	 * activity.getSupportActionBar(); if (supportActionBar != null) { if (show)
	 * { supportActionBar.show(); } else { supportActionBar.hide(); } } }else if
	 * (mContext instanceof Activity) { Activity activity = (Activity)mContext;
	 * if(activity.getActionBar() != null) { if (show) {
	 * activity.getActionBar().show(); } else { activity.getActionBar().hide();
	 * } } } }
	 */

	public interface VideoViewCallback {
		void onScaleChange(boolean isFullscreen);

		void onPause(final MediaPlayer mediaPlayer);

		void onStart(final MediaPlayer mediaPlayer);

		void onBufferingStart(final MediaPlayer mediaPlayer);

		void onBufferingEnd(final MediaPlayer mediaPlayer);
	}

	public void setVideoViewCallback(VideoViewCallback callback) {
		this.videoViewCallback = callback;
	}
}
